Setting numbers before the decimal point to 0

Hello all,

I am wonder how one could set the numbers before the decimal point to 0.

For example, if i have 23842348.000389384, then i would get 0.000389384.
As another example, if i have 15264.985653, then i would get 0.985653.

I have tried converting the number to a string, splitting it into an array by the decimal point.
But in that case, if the decimal has got zeroes in front, they get truncated.

Any ideas appreciated :smiley:

cheers!